Alarm or acoustic apparatus.



E. RUBES. ALARM 0R ACOUSTIC APPARATUS.

APPLICATION FILED JAN.11,1911.

Patented Aug. 13, 1912.

LUSXWMS.

ERNEST RUBES', OF IBBOOKLYvN, NEW YORK.

ALARM 0R ACOUSTIC APPA'RATUS.

To all 'whom t may concern.'

Be it known that I, Emmer Runes, a citizen of the United States, residing at Brooklyn, in the count-y of Kings and State of New York, have invented new and uselt'ul Improvements inl Alarms or Acoustic Apparatus, of which the following is a specilication. Y

This inventionrelates to an acoustic apparatus and more particularly to an alarm or'warning signal device for automobiles, motor boats and other analogous machines.

One object of the invention is to provide an apparatus or device of the class specified which is operative to produce an intensilicd sound of greatvolume and of a deep or sonorous character.

A further object of the invention is to dispense with the use of a single plate diaphragm or an acoustic plate of the lorm ordinarily adopted in alarms or signal devices of automobiles 'for producing attractive sounds and to substitute therefor what may be termed a closed acoustic chamber or box of such construction as to give an increased volume ot sound when actuated by vibrating means. l

A still further object of the invention is to provide a warning signal in which a sound may be generated ot a harmonious character and not irritating to thc human ear, in contradistinction to the sharp, crackingand irritating sound produced by the use of the common diaphragm or acoustic plate having a rigid mounting or of such limited vibrating area as to produce undesirable sound ell'ects.

The invention consists essentially oit' a casing having a resonator with a closed acoustic chamber in normally fixed position within the'casing and operated by a rotary electric motor actuating a rotary member operatively'engaging a portion ot' the chamber.

The invention further consists in the details ot' construction and arrangement ot the several parts which Will be more fully hcreinafter described and claimed.

In the drawing: Figure 1. is a sectional elevation of an acoustic apparat-us or alarm embodying the features of the invention. Fig. 2 is an enlarged detail section of a portion of the apparatus or alarm and particularly illustrating the means for adjusting the acoustic chamber relatively to the vibrating means therefor. Fig. 3 is a sec- Specflcation of Letters Patent.

Applicationled January 11, 1911.

Patented Aug. 13,1912.

Serial No. 602,002.

tional elevation of a portion of the apparatus or alarm showing the rotary vibrating member located within the closed acoustic chamber or box.

The improved acoustic apparatus oralarm comprises essentially a casing 5 having a resonator (3, a closed acoustic chamber or box 7 seeuredgwithin the casing and having a projection 8 on one o1" the sides thereof, and 'a motor 9 having. its armature shaft l0 projected and provided with a rotary member l1 preferably having a toothed periphery held in engagement with the projection 8 of the chamber 7.

, .As shown by Fig. l, the projection 8 is located on the side of the chamber-or box 7 near the resonator (5 and the armature shaft 10 projects upwardly through a suitable sleeve l2 in the lower portion ot the casing between the chamber 7 and the resonator 6 so that the rotary toothed member 1l will be disposed in advance of the said chamber 7 and preferably in central alincment with relation to the resonator7 which is tilted over a Yli'ront open extremity i3 of the casing 5.

In the construction shown by Fig. 3 the projected armature shaft l() extends into the chamber or box T and the projection is located on the inner surface oit the forward side ot', the said chamber or box, and as an obvious change in this arrangement` the projection 8 might be applied lo the opposite or rear side ot the chamber 7. ln the construction shown by Fig. 3, the armature shaft 10 is also provided willi a rotary toothed member 1l similar to that heretofore described and which is inclosed within the said chamber and may engage either the vfront or the rear side of the chamber in accordance with the application of the projection 8.

In all thc forms of the structure shown, the periphery of the chamber is so shaped as to avoid the lornlalion ol: abrupt angles, or the corners are curved, and, furthermore, the periphery of' each chamber does not have direct contact with the casing but is held spaced from the latter by the fasltening devices which will be presently specified in order to avoid the obstruction of the passage of sound wa ves f rom one member to the other of the chamber so that the entire chamber may.be vibratcd with material advantage in the production ol the signal tone or sound.

It is obvious that in time the continuous operation of the rotary member 1l in contact with the projection S will result in 'wear of either one of the latter parts to such an extent to impair the sound. producing qualities of the apparatus, and to provide for this contingency the chamber or box 7, as will be seen, is peripherally 'secured within the casing 5 by means of fastenings 14 engaging the same at regular intervals and consisting, in' the present instance, of headed screw bolts with inner reduced extremities l5 projecting through the periphery of the chamber and having clamping nuts 1G thereon and yielding dished Washers 17 interposed between the inner shouldered ends thereof and the adjacent portion-s of the chamber or box. rlhe function of the dished washers 17 "is to maintain a frictionally tight association between the bolts and the said chamber, and the clamping nuts 16 operatetto hold the bolts in fixed adjusted position relatively to the casing 5. The casing 5 is formed with slots 18 for the passage otf the bolts 11i therethrough, the bolts being shiftable in the slots without changing their assembled relation to the chamber or boX, and it is obvious that by shitting the several bolts the chamber or box may be moved toward the rotary member ll and thereby -set up and maintain a proper contiguous relation and contact ot' the said rotary member relatively to the projection 8.

ilre closed acoustic chamber or sound box may be constructed in any preferred manner and ot' suitable material and likewise the resonator as well as the casing will be constructed of material best adapted for the purpose and modified in form and general proportions as may be desired.

lhe resonator, as shown by Pig. l, is formed with a lower depression or sink 19 having an outlet nipple 20 at its lowest point., the purpose of this construction being to catch and drain what moist-ure may enter the resonator and prevent moisture from ruiming back into the casing and thus materially reduce liability of the closed acoustic chamber and cooperating parts to oxidation.

`'It ivill be observed that the use of the closed acoustic chamber or sound box has its iiat surfaces or sides free to vibrate, said sides being unrestrained or unconfined, as

' t'or instance by devices at the outer portions thereof, and as a result the said chamber will produce a deep or sonorous sound without irritating ettcct on the ear. The peripheral attachment of the chamber or sound box leaves thc greater portion of the latter free for vibrating operation and no part ot' the said chamber is in direct contact with the inelosing casing 5 and by this means the vibrations of the chamber will be lessY retarded.

What is claimed is:

l. In an acoustic apparatus or signaling device, a casing having a resonator secured thereto, in combination With'a completely closed acoustic chamber mounted in and in closed by the casing and structurally independent of the latter, the periphery of the chamber being held out of contact With relation to the casing, a rotary member engaging and vibrating one side of the chamber and by the transmission of sound Waves vibrating also the remaining side of said chamber, and means for operating said member.

2. In an acoustic apparatus or signalin device, a casing having a resonator secure thereto, in combination with a completely closed acoustic chamber mounted in and inclosed by said-casing and having opposed vertical sides,'the' periphery-of the chamber being held out of l Antl it with relation to the casing, a rotary einher engaging and vibrating one side of the chamber and by the transmission of sound Waves vibrating also the remaining side of said chamber, and a rotary electric motor for operating said member.

3. I ii an acoustic apparatus or signaling device, a casing having a resonator secured thereto, in combination with a completely closed acoustic chamber mounted in and inclosed by said casing and provided with opposite flat sides, the periphery of the chamber being held out of contact With relation to the casing, a rotary toothed member held in engagement-with a portion of one of said sides and operating to vibrate said side and by the transmission of sound Waves Vibrating also the remaining side of said chamber and an electric motor for actuating said toothed member.

4. In an acoustic apparatus or signalin device, a casing having a resonator secured thereto, a completely closed acoustic chamber mounted in and inclosed by said Casin and having opposite fiat sides, one of said sides being provided with a projection, t-he periphery of the chamber being held out of contact with relation to the casing, a rotary toothed member engaging said projection and operable to vvibrate said side carrying the projection and by the transmission of sound waves vibrating also the ref maining side of said chamber, and means for actuating said rotary toothed member.

5. In an acoustic apparatus or signalin device, a casing having a resonator secure thereto, in combination with an acoustic chamber which is completely closed and provided with a plurality of vibrating members having overlapping associated edge portions to cause the vibrations to continue from one of 'said members to the other, the

' said associated edge portions of the chamber being held out of contact with relation to the casing, a. rotar member enga 'ng and viing the latter and having a fixed operative brating one of e members and y the transosition in the casing, an means for operat vmission of sald waves vibrating the other member, and means for operating said rotary member.

6. In an acoustic apparatus or signaling device, a casing having a resonator, a vibrating chamber held out of contact With relation to and adjustably mounted in and inf closed by thesaid casing, a rotary toothed member for vibrating said chamber engaging said toothed member.

In testimony whereof I have hereunto set 15A my hand in presence of two subscribing witnesses.

ERNEST RUBES.

Witnesses:

ROSE M. SEFTON, CMAS. A. Rowm. 

